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authorAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
committerAnton Tananaev <anton.tananaev@gmail.com>2019-03-31 22:35:39 -0700
commit59416923dcb3a756eaf532cc4259f2f6625c0762 (patch)
tree9082dae6616deac8fda432b7bfd80e4a52b6d9dc /src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java
parent79a129dd6327d932133d6b9a50190d3f4927bff9 (diff)
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Convert project to gradle
Diffstat (limited to 'src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java')
-rw-r--r--src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java125
1 files changed, 125 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java
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+++ b/src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class Gt02ProtocolDecoder extends BaseProtocolDecoder {
+
+ public Gt02ProtocolDecoder(Protocol protocol) {
+ super(protocol);
+ }
+
+ public static final int MSG_DATA = 0x10;
+ public static final int MSG_HEARTBEAT = 0x1A;
+ public static final int MSG_RESPONSE = 0x1C;
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ByteBuf buf = (ByteBuf) msg;
+
+ buf.skipBytes(2); // header
+ buf.readByte(); // size
+
+ Position position = new Position(getProtocolName());
+
+ // Zero for location messages
+ int power = buf.readUnsignedByte();
+ int gsm = buf.readUnsignedByte();
+
+ String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+ if (deviceSession == null) {
+ return null;
+ }
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ position.set(Position.KEY_INDEX, buf.readUnsignedShort());
+
+ int type = buf.readUnsignedByte();
+
+ if (type == MSG_HEARTBEAT) {
+
+ getLastLocation(position, null);
+
+ position.set(Position.KEY_POWER, power);
+ position.set(Position.KEY_RSSI, gsm);
+
+ if (channel != null) {
+ byte[] response = {0x54, 0x68, 0x1A, 0x0D, 0x0A};
+ channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(response), remoteAddress));
+ }
+
+ } else if (type == MSG_DATA) {
+
+ DateBuilder dateBuilder = new DateBuilder()
+ .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+ .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+ position.setTime(dateBuilder.getDate());
+
+ double latitude = buf.readUnsignedInt() / (60.0 * 30000.0);
+ double longitude = buf.readUnsignedInt() / (60.0 * 30000.0);
+
+ position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+ position.setCourse(buf.readUnsignedShort());
+
+ buf.skipBytes(3); // reserved
+
+ long flags = buf.readUnsignedInt();
+ position.setValid(BitUtil.check(flags, 0));
+ if (!BitUtil.check(flags, 1)) {
+ latitude = -latitude;
+ }
+ if (!BitUtil.check(flags, 2)) {
+ longitude = -longitude;
+ }
+
+ position.setLatitude(latitude);
+ position.setLongitude(longitude);
+
+ } else if (type == MSG_RESPONSE) {
+
+ getLastLocation(position, null);
+
+ position.set(Position.KEY_RESULT,
+ buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
+
+ } else {
+
+ return null;
+
+ }
+
+ return position;
+ }
+
+}